【摘要】：振動(dòng)在自然界中普遍存在。但振動(dòng)通常對(duì)結(jié)構(gòu)是有害的,因此,對(duì)振動(dòng)進(jìn)行控制具有重要意義。但振動(dòng)控制中的主動(dòng)控制系統(tǒng)體積龐大、且耗能多等,而被動(dòng)控制環(huán)境適應(yīng)能力比較差,因而,半主動(dòng)控制在很多場合成為首選方案。本文將壓電半主動(dòng)控制與壓電能量收集技術(shù)相結(jié)合,在有效控制振動(dòng)的同時(shí),還可以實(shí)現(xiàn)能量收集。論文首先結(jié)合壓電材料的機(jī)電耦合特性,對(duì)非線性同步開關(guān)阻尼(SSD)的半主動(dòng)控制系統(tǒng)建立了理論模型。在此基礎(chǔ)上分析了SSD技術(shù)(包括SSDI、SSDS、SSDV、改進(jìn)型SSDS)的工作原理,并推導(dǎo)出了各個(gè)控制方法在一個(gè)周期內(nèi)的機(jī)電轉(zhuǎn)換能量值的表達(dá)式。針對(duì)于該技術(shù)中的關(guān)鍵技術(shù)-開關(guān)設(shè)計(jì),本文采用了一種無源峰值檢測開關(guān)電路實(shí)現(xiàn)其功能,并詳細(xì)推導(dǎo)了其與SSDI、SSDS技術(shù)相結(jié)合時(shí)可以實(shí)現(xiàn)不同的閉合時(shí)間。同時(shí),通過實(shí)驗(yàn)的方法確定了該半主動(dòng)控制系統(tǒng)中SSDV技術(shù)的最優(yōu)外接電壓;其次,對(duì)半主動(dòng)控制系統(tǒng)的實(shí)現(xiàn)電路進(jìn)行了改進(jìn),將壓電元件在振動(dòng)過程中產(chǎn)生的電荷輸出或存儲(chǔ)。從理論上分析了其工作原理,詳細(xì)推導(dǎo)了其輸出電壓和輸出功率;最后,本文還將能量收集技術(shù)與SSDV半主動(dòng)控制相結(jié)合,依據(jù)實(shí)驗(yàn)結(jié)果,設(shè)計(jì)適當(dāng)?shù)姆�(wěn)壓電路,通過一定的開關(guān)控制策略,為SSDV半主動(dòng)控制系統(tǒng)提供穩(wěn)定的2.5v直流電壓,從而實(shí)現(xiàn)能量自供給。半主動(dòng)控制系統(tǒng)結(jié)構(gòu)簡單且易于實(shí)現(xiàn),同時(shí)本文中所采用的無源開關(guān)控制電路功耗極低,可以實(shí)現(xiàn)半主動(dòng)控制系統(tǒng)的能量自供給。通過實(shí)驗(yàn)對(duì)比發(fā)現(xiàn)SSDS、改進(jìn)型SSDS、SSDI及SSDV的抑振效果逐漸增強(qiáng),與理論推導(dǎo)結(jié)果相吻合。其中,SSDV在振動(dòng)能量收集電壓2.5v的作用下,達(dá)到了較好的控制效果。
[Abstract]:Vibration is common in nature. However, vibration is usually harmful to structures, so it is important to control vibration. However, the active control system in vibration control is large in volume and energy consuming, but the adaptability of passive control environment is poor. Therefore, semi-active control has become the first choice in many situations. In this paper, piezoelectric semi-active control and piezoelectric energy collection technology are combined to control vibration effectively and realize energy collection at the same time. Based on the electromechanical coupling characteristics of piezoelectric materials, a theoretical model for the semi-active control system of nonlinear synchronous switching damping (SSD) is established in this paper. On this basis, the working principle of SSD technology (including the improved SSDI,SSDS,SSDV, SSDS) is analyzed, and the expressions of the electromechanical conversion energy values of each control method within a period are derived. For the key technology of this technology-switch design, this paper adopts a passive peak detection switch circuit to realize its function, and deduces in detail that it can realize different closing time when it is combined with SSDI,SSDS technology. At the same time, the optimal external voltage of the SSDV technology in the semi-active control system is determined by experiment. Secondly, the circuit of the semi-active control system is improved to output or store the charge generated by the piezoelectric element in the process of vibration. Its working principle is analyzed theoretically, and its output voltage and output power are deduced in detail. Finally, the energy collection technology is combined with SSDV semi-active control. According to the experimental results, a suitable voltage regulator circuit is designed to provide a stable 2.5v DC voltage for the SSDV semi-active control system through a certain switching control strategy. Thus the self-supply of energy can be realized. The structure of the semi-active control system is simple and easy to implement. At the same time, the passive switching control circuit adopted in this paper has very low power consumption, which can realize the energy self-supply of the semi-active control system. Through the experimental comparison, it is found that the anti-vibration effect of SSDS, improved SSDS,SSDI and SSDV is gradually enhanced, which is in agreement with the theoretical results. Among them, SSDV has achieved better control effect under the action of 2.5 v vibration energy collection voltage.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB53

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本文編號(hào)：2446348